Janet Street-Porter

A former editor of The Independent on Sunday, Janet Street-Porter is now the paper’s editor-at-large. As a journalist and broadcaster she has had an innovative and groundbreaking career in television, creating programmes for the BBC, Channel 4 and LWT, for which she has won a Bafta and the Prix Italia. She is also vice president of the Rambler’s Association.

The Prime Minister wants EU leaders to unite against global companies who evade tax, and says the G8 Summit, to be held in Northern Ireland in June, will mark a "turning point" in his campaign. Few voters would disagree with his intentions, especially married couples. Research carried out by the Christian charity Care recently indicated that a married couple with two children, where one parents works, will be paying 42 per cent more in tax in Britain than in comparable economies. The Chancellor regularly promises tax breaks for married couples, but they seem as unlikely as Mr Cameron's dream of wringing billions from corporate tax evaders.

While North Korea threatens war, the South offers the world a chance to party. Psy released "Gentleman", his long-awaited follow-up to "Gangnam Style" at midnight on Thursday in 119 countries, and performed it for the first time in concert in Seoul yesterday. Check out his new dance moves on page 5. These days, the chubby South Korean popster is managed by the same people as Justin Bieber, so is his follow-up a sell-out? Psy's "Gangnam" video racked up a whopping 1.5 billion hits on YouTube, the most-watched video in the history of the internet. That makes him a cultural phenomenon, well worth an in-depth analysis by Mr Imagine, Alan Yentob. Sneer not, Psy and his bonkers dancing have made a lot of people very happy – not a lot of popular music crosses this many frontiers. Which must be why the Today programme took a break from analysing Baroness Thatcher's legacy, and the parlous state of banking in the EU, to debate one-hit wonders last Friday morning.

I never thought I'd feel sympathy for geeky David Miliband, but I do. Sibling rivalry is a nasty canker that quietly eats away at a relationship. It starts off as a bit of harmless fun; then, before you know it, you're not speaking and it can take decades to repair the damage. My younger sister and I had a horrible relationship, which was finally patched up when our mother was dying.

George Osborne's attempts to solve our housing crisis are heading in the same direction as Parliament's attempts to hijack press freedom – destined for the pending tray, criticised on all sides as unhelpful and unworkable.

Faced with open warfare from his own party on two fronts, regulation of the press and proposals to impose a minimum price per unit on booze, is Cameron in the last chance saloon? Of the two issues, booze is the one that he should make no compromise over whatsoever. Sadly, it sounds as if the Prime Minister is turning out to be made of balsa wood, not iron.

Humans live longer than ever before, and some of the richest people on the planet are pouring their wealth into avoiding the one event no one can avoid, no matter what we have in the bank – death. A group of technology billionaires, including Mark Zuckerberg of Facebook, are funding a new award called the Breakthrough Prize in Life Sciences, which comprises five payouts of $3m (£2m) each, for research work into "extending human life". Larry Ellison has funded work on anti-ageing, and so has Bill Gates. These people have revolutionised life for millions, but can't face that moment when they draw their last breath, just like the rest of us.